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Scientific American

2021-10-11, 17:56
A Blank Wall Can Show How Many People Are in a Room and What They're Doing


The technique is the latest method to glean a surprising amount of surveillance from a meager source



-- Read more on ScientificAmerican.com


https://www.scientificamerican.com/artic...yre-doing/
www.chinaphonearena.com > Off The Wall > Tech & Science > [Sci-Am] A Blank Wall Can Show How Many People Are in a Room and What They're Doing